this is addictive fun this engine lark ! i just bought another villiers engine a mk10 , it is missing carb and exhaust but otherwise a nice unit i cleaned up the points and put my c25 carb on and it's a sweet runner not bad for £14.99 ,

I have a few aircooled british engines myself , being BSA 420's and Petter A1, Pettr J1 and a Coventry AD3/2 aircooled diesel ! The smaller engines really benefit from driving something to make a nice exhibit, even a compressor or similar, loads them a little and add interest , better to see a small aircooled doing something than a large open crank idling away aimlessly .